JWT5303 three-phase standard watt-hour meter is a kind of multi-function high-accuracy intelligent watt-hour measurement instrument which is designed with most advanced digital electronic technology end uses high-speed DSP processor, as its core technology. It comprises of high-speed DSP processor, two-way current frequency converter, digital controller, and digital display. Its voltage and current inputs are separated by passive transformer, so it is a kind of watt- hour measurement instrument with wide current measurement range, two-way current measurement capability, high accuracy, good stability, high overloading capacity, and strong practicability.
Technical Parameters
Input parameters
|
Voltage input
|
Input voltage(V)
|
40-480
|
Input voltage range(v)
|
60、120、240、480
|
Overloading capacity(v)
|
600
|
Input load
|
≤0.5mA(480v)
|
Current input
|
Input voltage(a)
|
0.01-100
|
Input voltage(a)
|
100,50,25,10,5,2.5,1,0.5,、0.25,0.1,0.05,0.025
|
Overloading capacity(a)
|
150
|
Input load
|
≤0.3mΩ(100A-20A≤6mAΩ(10A-0.01A)
|
Output pulse frequency
|
fH=CH.p/3600(Hz) fL=fH/10000(Hz)
|
Output signal: TTL signal
|
Power consumption:15VA
|
Pre-heating time:30Min
|
accuracy
|
accuracy
|
Grade 0.02,0.03,0.05,0.1
|
Power accuracy
|
Active power accuracy
|
0.05%、0.1%(pf≥0.5)
|
Reactive power accuracy
|
0.1%、0.2%(pf≥0.5)
|
Watt-hour accuracy
|
Active watt-hour accuracy
|
0.05%、0.1%(pf≥0.5)
|
Reactive watt-hour accuracy
|
0.1%、0.2%(pf≥0.5)
|
Displayed contents
|
Three-phase/ four-line voltage (Uan,Ubn,Ucn)
Three-phase/three-line voltage(Uab,Ubc,Uca)
three-phase current (la,lb,lc(A)) ,Active power(p(w))/apparent power(s(va)) Power factor(p1)/phase angle(¢),Input signal frequency(f)
|
Power supply
|
220v±10%、50Hz±5%
|
Relative humidity
|
≤85%No corrosive gasses exist
|
Outer dimensions
|
482mm×420mm×140mm
|
Operating environment : Temperature5℃-40℃
|
Total weight :About 9kg
|